14 homologous genes encoding globins (hemoglobin, myoglobin) in the human genome were originally derived from a single ancestor that duplicated 500–600 million years ago. Which term most adequately describes the relationship between these genes?
A. sister chromatids
B. gene family
C. gene cluster
D. moderately repetitive sequences
E. highly repetitive sequences
B. gene family
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Rainforests, old growth forests, and coral reefs are examples of biological __________
Fill in the blank(s) with the appropriate word(s).
Reciprocal innveration means that the ____
a. antagonist muscle groups contract at the same time b. antagonist muscle groups relax at the same time c. antagonist muscle groups alternate contraction and relaxation d. synergistic muscle groups contract at the same time e. synergistic muscle groups relax at the same time
Sickle cell anemia is caused by a defect in the
A. ability of the blood to clot. B. chloride ion transport protein. C. ability of red blood cells to fight infection. D. oxygen-carrying pigment hemoglobin.
Why is it that there are more immunoglobulin proteins than can be accounted for by the number of V gene segments?
What will be an ideal response?